Sinochem New Network Technology Jilin Provincial Science and Technology Department recently revealed that the key technology research projects for low-rank coal, multi-coal seam, thin coal seam CBM production fracturing combination and pitching pressure division recently passed expert appraisal, marking China's low-rank coal area CBM Exploration and development technologies have achieved breakthroughs.

It is understood that based on the features such as depth of burial depth, thickness, roof and floor, the project has studied for the first time the current-limited perforation optimization technology applicable to coalbed methane wells in low-rank coal, multi-coal formations and thin coal seams, and proposed the use of different dense-site injections. Hole program. In addition, for the first time in China, the CBM gas ballast pressure-limiting and fracturing technology applicable to low-rank coal, multiple coal seams, and thin coal seam regions was studied. At the same time, the practice of preliminary drainage of 3 wells in the Hunchun coalfield in Jilin Province has proved that the gas production per well exceeds 3,000 cubic meters per day, which is of commercial development value.

The expert group stated that this is a major breakthrough in China's coalbed methane exploration and development for the first time in the low-rank coal area. Its technology is the first of its kind in this field and has guiding significance for the exploration and development of coalbed methane in China's low-rank coal areas. The promotion and application of this technology will further optimize China's low-rank coal CBM extraction technologies and accelerate the industrialization and utilization of low-rank coal CBM.